CN103237253B - Compatible multiple audio-video signal interface also has the DVB-S Set Top Box of standby mode - Google Patents
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Abstract
The present invention relates to the multiple audio-video signal interface of a kind of compatibility and there is the DVB-S Set Top Box of standby mode, comprise, signal strength detection device, unified signal interface arrangement and electric power controller, described electric power controller connects described signal strength detection device and determines whether described Set Top Box enters holding state with the signal strength signal intensity detected according to described signal strength detection device, the connection of the audio-video signal of compatible DVI, HDMI and DisplayPort form of described unified signal interface arrangement.By the present invention, the audio-video signal of multiple format can be received, simultaneously when digital video broadcast-satellite signal is very poor, stop the reception to digital video broadcast-satellite signal and process, enter holding state, avoid unnecessary power consumption.
Description
Technical field
The present invention relates to satellite TV reception field, particularly relate to the multiple audio-video signal interface of a kind of compatibility and there is the DVB-S Set Top Box of standby mode.
Background technology
Satellite broadcasting (satellitebroadcasting) utilizes broadcasting satellite relay television or sound broadcasting signal earthward, for the broadcast mode that general public directly receives.After in July, 1963 U.S.'s successful launch in the world the 1st synchronous communication satellite " synchronous No. II ", satellite communication obtains developing very soon.To 20 century 70 mid-terms, various countries start the broadcasting satellite of emission experiment.The practical stage is entered to the satellite broadcasting eighties.
Digital video broadcasting DVB, be by " DVBProject " safeguard a series of be the international Digital Television Open Standard admitted." DVBProject " is an industrial organization by more than 300 member compositions, it organize CENELEC and European Broadcasting Union EBU to constitute jointly by european telecommunications standards institute ETSI, European electronic standard " joint specialist group " JTC initiates.Different according to the channel of transmission, be divided into satellite television DVB-S, cable TV DVB-C, hand-held terrestrial wireless TV DVB-H and terrestrial television DVB-T.
But, the receiver of existing digital video broadcast-satellite signal DVB-S is when the non-constant of signal, still must carry out reception and the process of digital video broadcast-satellite signal, what play is insignificant audio-video frequency content, cause unnecessary power consumption, meanwhile, existing DVB-S receiver often only has a kind of interface of audio, video data form, the audio, video data that the outside audio, video data memory receiving single form sends, compatible poor.
Therefore, need the multiple audio-video signal interface of a kind of compatibility and there is the DVB-S Set Top Box of standby mode, the receiver of existing DVB-S can be transformed, so that the signal strength signal intensity of digital video broadcast-satellite signal can be detected in real time, reception and the process of corresponding signal is not carried out when signal strength signal intensity is too poor, the audio-video signal of DVI, HDMI and DisplayPort form can be received simultaneously, improve the applicability of Set Top Box.
Summary of the invention
In order to solve the problem, the invention provides the multiple audio-video signal interface of a kind of compatibility and there is the DVB-S Set Top Box of standby mode, the signal strength signal intensity of digital video broadcast-satellite signal is detected by increasing signal strength detection device, and the signal strength signal intensity detected according to described signal strength detection device under electric power controller controls determines whether described Set Top Box enters holding state, the transmitting-receiving of the audio-video signal of compatible DVI, HDMI and DisplayPort form of the unified signal interface arrangement simultaneously adopting field-programmable gate array fpga chip to realize.
According to an aspect of the present invention, provide the multiple audio-video signal interface of a kind of compatibility and there is the DVB-S Set Top Box of standby mode, comprise signal strength detection device, unified signal interface arrangement and electric power controller, described electric power controller connects described signal strength detection device and determines whether described Set Top Box enters holding state with the signal strength signal intensity detected according to described signal strength detection device, the connection of the audio-video signal of compatible DVI, HDMI and DisplayPort form of described unified signal interface arrangement.More specifically, the multiple audio-video signal interface of described compatibility the DVB-S Set Top Box with standby mode comprise further: quarternary phase-shift keying (QPSK) signal qpsk demodulator, and receiving satellite word television broadcasting signal also carries out QPSK demodulation to described digital video broadcast-satellite signal, described signal strength detection device detects the signal strength signal intensity of the digital video broadcast-satellite signal received, and exports described signal strength signal intensity, matched filter, connects described qpsk demodulator, carries out matched filtering to the signal after QPSK demodulation, with restraint speckle, improves signal to noise ratio, the Viterbi decoder of soft-decision, connect described matched filter, soft-decision, Viterbi decoding are carried out successively to the signal that described matched filter exports, described soft-decision is close to best maximum-likelihood decoding, realize in scale larger than hard decision, but improve signal to noise ratio, described Viterbi decoding is a kind of decoding algorithm of convolution code, convolutional deinterleaver, connects the Viterbi decoder of described soft-decision, the signal that the Viterbi decoder of described soft-decision is exported carry out the degree of depth be 12 convolution deinterleave, export convolution deinterleave after error protection bag, reed-solomon RS decoder, connects convolutional deinterleaver, carries out RS(204,188 to the error protection bag received) decoding, export the packet of 188 bytes, the packet of described 188 bytes is the transport stream TS stream of Motion Picture Experts Group MPEG-2 frame structure, sync byte reverses and goes randomisation means, connects RS decoder, by the TS diffluence randomization of MPEG-2 frame structure, and the sync byte SYNC1 byte in going the TS after randomization to flow is reversed, Deplexing apparatus, connect the reversion of described sync byte and go randomisation means, TS after receiving also sync byte reversion described in demultiplexing and going randomisation means reversal synchronization byte SYNC1 byte flows, outputting audio data TS flows, video data TS flows, additional data TS flows, Program Association Table PAT, Program Map Table PMT and service description list SDT, voice data TS flows, video data TS flows, additional data TS flows, Program Association Table PAT, Program Map Table PMT and service description list SDT has different Packet Identifier PID, described PID is used to be responsible for assigning the identifier of different value for different types of data in TS stream, described additional data comprises the data of independently data service, also comprise and described audio content, the data that described video content is relevant, audio and video display device, connect described Deplexing apparatus with audio reception data TS stream, video data TS stream, additional data TS stream, Program Association Table PAT, Program Map Table PMT and service description list SDT, and according to the descriptor that Program Association Table PAT, Program Map Table PMT and service description list SDT obtain each program in described digital video broadcast-satellite signal, flow according to voice data TS, video data TS flows, additional data TS spreads playback video content and additional data, described unified signal interface arrangement connects described audio and video display device, fpga chip is adopted to realize the connection of the audio-video signal of compatible DVI, HDMI and DisplayPort form, and by the audio-video signal retransmission of reception to described audio and video display device to carry out audio-video frequency content broadcasting, described fpga chip is the EP2C5Q208C8N of ALTERA company, described electric power controller connects described signal strength detection device to receive described signal strength signal intensity, determines whether described Set Top Box enters holding state according to described signal strength signal intensity, state indicating device, indicates the current operating state of described Set Top Box, comprises the size of described signal strength signal intensity, whether described Set Top Box is in holding state, whether the data transmit-receive of described unified signal interface arrangement normal, wherein, the PID of each program in described digital video broadcast-satellite signal is obtained according to Program Association Table PAT, from described Program Map Table PMT, obtain the PID of PID, the additional data TS stream of PID, the video data TS stream that voice data TS corresponding to each program flows according to the PID of each program, from described service describing table SDT, obtain the programm name of each program according to the PID of each program, wherein, when described signal strength signal intensity is less than or equal to 40dBuV, described electric power controller controls described Set Top Box and enters holding state, and when described signal strength signal intensity is greater than 40dBuV, described electric power controller controls described Set Top Box and enters normal operating conditions.
More specifically, described compatibility multiple audio-video signal interface the DVB-S Set Top Box with standby mode comprise further: described additional data is caption data.
More specifically, described compatibility multiple audio-video signal interface the DVB-S Set Top Box with standby mode comprise further: the audio-video signal of described DVI, HDMI and DisplayPort form is from outside audio/video storage device.
More specifically, described compatibility multiple audio-video signal interface the DVB-S Set Top Box with standby mode comprise further: described audio and video display device comprises separates TS bag unit, to carry out solution TS package operation to the TS stream received.
Accompanying drawing explanation
Below with reference to accompanying drawing, embodiment of the present invention are described, wherein:
The multiple audio-video signal interface of the compatibility that Fig. 1 illustrates according to an embodiment of the present invention also has the block diagram of the DVB-S Set Top Box of standby mode.
Wherein, 1, qpsk demodulator; 2, signal strength detection device; 3, matched filter; 4, the Viterbi decoder of soft-decision; 5, convolutional deinterleaver; 6, RS decoder; 7, sync byte reverses and goes randomisation means; 8, Deplexing apparatus; 9, audio and video display device; 10, unified signal interface arrangement; 11, electric power controller; 12, state indicating device.
Embodiment
Below with reference to accompanying drawings to the multiple audio-video signal interface of compatibility of the present invention and the embodiment with the DVB-S Set Top Box of standby mode be described in detail.
Fig. 1 illustrates the multiple audio-video signal interface of the compatibility illustrated according to an embodiment of the present invention and has the block diagram of the DVB-S Set Top Box of standby mode.Wherein said DVB-S Set Top Box comprises, signal strength detection device 2, unified signal interface arrangement 10 and electric power controller 11, described electric power controller 11 connects described signal strength detection device 2 and determines whether described Set Top Box enters holding state, the connection of the audio-video signal of compatible DVI, HDMI and DisplayPort form of described unified signal interface arrangement 10 with the signal strength signal intensity detected according to described signal strength detection device 2.Further, described DVB-S Set Top Box also comprises, quarternary phase-shift keying (QPSK) signal qpsk demodulator 1, and receiving satellite word television broadcasting signal also carries out QPSK demodulation to described digital video broadcast-satellite signal, described signal strength detection device 2 detects the signal strength signal intensity of the digital video broadcast-satellite signal received, and exports described signal strength signal intensity, matched filter 3, connects described qpsk demodulator 1, carries out matched filtering to the signal after QPSK demodulation, with restraint speckle, improves signal to noise ratio, the Viterbi decoder 4 of soft-decision, connect described matched filter 3, soft-decision, Viterbi decoding are carried out successively to the signal that described matched filter 3 exports, described soft-decision is close to best maximum-likelihood decoding, realize in scale larger than hard decision, but improve signal to noise ratio, described Viterbi decoding is a kind of decoding algorithm of convolution code, convolutional deinterleaver 5, connects the Viterbi decoder 4 of described soft-decision, the signal that the Viterbi decoder 4 of described soft-decision is exported carry out the degree of depth be 12 convolution deinterleave, export convolution deinterleave after error protection bag, reed-solomon RS decoder 6, connect convolutional deinterleaver 5, RS(204 carried out, 188 to the error protection bag received) decoding, export the packet of 188 bytes, the packet of described 188 bytes is the transport stream TS stream of Motion Picture Experts Group MPEG-2 frame structure, sync byte reverses and goes randomisation means 7, connects RS decoder 6, by the TS diffluence randomization of MPEG-2 frame structure, and the sync byte SYNC1 byte in going the TS after randomization to flow is reversed, Deplexing apparatus 8, connect the reversion of described sync byte and go randomisation means 7, TS after receiving also sync byte reversion described in demultiplexing and going randomisation means 7 reversal synchronization byte SYNC1 byte flows, outputting audio data TS flows, video data TS flows, additional data TS flows, Program Association Table PAT, Program Map Table PMT and service description list SDT, voice data TS flows, video data TS flows, additional data TS flows, Program Association Table PAT, Program Map Table PMT and service description list SDT has different Packet Identifier PID, described PID is used to be responsible for assigning the identifier of different value for different types of data in TS stream, described additional data comprises the data of independently data service, also comprise and described audio content, the data that described video content is relevant, audio and video display device 9, connect described Deplexing apparatus 8 with audio reception data TS stream, video data TS stream, additional data TS stream, Program Association Table PAT, Program Map Table PMT and service description list SDT, and according to the descriptor that Program Association Table PAT, Program Map Table PMT and service description list SDT obtain each program in described digital video broadcast-satellite signal, flow according to voice data TS, video data TS flows, additional data TS spreads playback video content and additional data, described unified signal interface arrangement 10 connects described audio and video display device 9, fpga chip is adopted to realize the connection of the audio-video signal of compatible DVI, HDMI and DisplayPort form, and by the audio-video signal retransmission of reception to described audio and video display device 9 to carry out audio-video frequency content broadcasting, described fpga chip is the EP2C5Q208C8N of ALTERA company, described electric power controller 11 connects described signal strength detection device 2 to receive described signal strength signal intensity, determines whether described Set Top Box enters holding state according to described signal strength signal intensity, state indicating device 12, indicates the current operating state of described Set Top Box, comprises the size of described signal strength signal intensity, whether described Set Top Box is in holding state, whether the data transmit-receive of described unified signal interface arrangement 10 normal, wherein, the PID of each program in described digital video broadcast-satellite signal is obtained according to Program Association Table PAT, from described Program Map Table PMT, obtain the PID of PID, the additional data TS stream of PID, the video data TS stream that voice data TS corresponding to each program flows according to the PID of each program, from described service describing table SDT, obtain the programm name of each program according to the PID of each program, wherein, when described signal strength signal intensity is less than or equal to 40dBuV, described electric power controller 11 controls described Set Top Box and enters holding state, and when described signal strength signal intensity is greater than 40dBuV, described electric power controller 11 controls described Set Top Box and enters normal operating conditions.
Wherein, quarternary phase-shift keying (QPSK) signal is called for short " QPSK ", and he is divided into absolute phase-shift and relative phase shift two kinds.Because absolute phase-shift mode exists phase fuzzy problem, adopt relative phase shift system QDPSK so main in practice.He has the advantage of a series of uniqueness, has been widely used in radio communication at present, becomes a kind of very important modulation demodulation system in modern communications.In the modulation system of digital signal, QPSK quadriphase PSK is the most frequently used a kind of Signals in Satellite Data Stream modulation system, and he has the higher availability of frequency spectrum, stronger anti-interference, it is also comparatively simple to realize on circuit.Quaternary phase shift modulation utilizes four of carrier wave kinds of out of phase differences to characterize the digital information of input, is quaternary phase-shift keying.QPSK is the phasing technique when M=4, and he defines four kinds of carrier phases, is respectively 45 °, 135 °, 225 °, 315 °, the data of modulator input are sequence of binary digits, in order to energy and quarternary carrier phase cooperate, then need binary data to be transformed to quaternary number certificate, Here it is needs two bits every in sequence of binary digits to be divided into one group, has four kinds of combinations, namely 00,01,10,11, wherein each group is called dibit elements.Each dibit elements is made up of two binary information bit, and they represent a symbol in the quaternary four symbols respectively.In QPSK, each modulation can transmit 2 information bits, and these information bits are transmitted by four kinds of phase places of carrier wave.Demodulator judges according to planisphere and the phase place of carrier signal that receives the information bit that transmitting terminal sends.
Wherein, matched filter does two kinds of process to signal: one, the phase-frequency characteristic of filter and signal phase frequency characteristic conjugation, makes to output signal all frequency components and all form peak value at output in-phase stacking.Two, according to the amplitude-frequency characteristic of signal, input waveform is weighted, so as most effectively Received signal strength energy and suppress disturb power output.Namely, when signal and noise enter filter simultaneously, he makes signal component occur kurtosis in a flash at certain, and noise contribution is suppressed.Matched filter is widely used in radar, sonar and communicates.The effect of matched filter is: one, improve signal to noise ratio.Do not rant out, any electronic system has the link of matched filtering or approximate match filtering, and object improves signal to noise ratio.Two, for large time-bandwidth product signal, matched filtering is equivalent to pulse compression.Therefore range resolution ratio and the range measurement accuracy of radar or sonar can be improved.In spread spectrum communication, despreading can be realized.
Wherein, viterbi decoding algorithm is a kind of decoding algorithm of convolution code.Shortcoming is exactly along with the complexity increase of the increase algorithm of constraint length is very fast.The path will compared when constraint length N is 7 just has 64, and when being 8, path becomes 128.Be less than in the occasion of 10 so viterbi decoding is generally applied in constraint length.First talk about viterbi coding (citing constraint length is 7): the state (0,1) of encoder 7 delayers constitutes 64 states of whole encoder.Each state, when encoder input 0 or 1, can jump among another.Such as during 110100 input 1, becoming 101001(is exactly shift register in fact).And export also is change thereupon.The process of such decoding is exactly inverse process.Algorithm specifies that the data that t receives all will carry out comparing for 64 times, be exactly 64 state Mei Tiao road You Liangtiao branches (because inputs 0 or 1), simultaneously, jump set is in different two states, two output and actual outputs received accordingly compared, what measurement value was large abandons (namely comparative result differs greatly), and what stay is just called survivor path, survivor path is added then upper measuring of moment survivor path preserve, such 64 survivor paths just add a step.When decoding terminates, select one and measure minimum from 64 survivor paths, anti-this survivor path of release (being called backtracking), show that corresponding decoding exports.
In addition, described compatibility multiple audio-video signal interface the DVB-S Set Top Box with standby mode comprise further: described additional data is caption data.Caption data can carry out combination display over the display with the video data of same program.
In addition, described compatibility multiple audio-video signal interface the DVB-S Set Top Box with standby mode comprise further: the audio-video signal of described DVI, HDMI and DisplayPort form is from outside audio/video storage device.
Wherein, DVI, HDMI, DisplayPort, DiiVA are digital audio/video interface standards common on market.DVI(DigitalVisualInterface), i.e. digital visual interface, by SiliconImage, Intel(Intel), Compaq(Compaq), IBM, HP(Hewlett-Packard), NEC, the companies such as Fujitsu (Fujitsu) form DDWG(DigitalDisplayWorkingGroup jointly, numerical monitor working group) in the interface standard of release in 1999, DVI is based on PanalLink interfacing, based on TMDS(transition minimized differential signaling) electronic protocol is as basic electrical connection, highest signal transmission code stream is 1.65Gbps, analog video interface before comparing, it is fast that it has speed, picture is clear, support the feature of HDCP agreement.HDMI(HighDefinitionMultimediaInterface), i.e. HDMI (High Definition Multimedia Interface), by Hitachi, Panasonic, Philip, SiliconImage, Sony, Thomson, the HDMI high-definition media interface that company of Toshiba etc. 7 is set up jointly is organized in formally to be issued on December 9th, 2002, HDMI is based on DVI, adopt TMDS encoding mechanism, to vision signal, audio signal and control signal carry out time-division control, the maximum data transmission speed is 5Gbps, overcome DVI for panel TV and wide colour gamut terminal transparency poor, image copyright protection is lacked and supports, do not support digital audio and video signals, the shortcomings such as interface volume is large.DisplayPort, is called for short DP interface, is issued by VESA (video electronics standard tissue) in May, 2006.It is a kind of open standard for all display devices (comprising inside and outside interface); adopt 8B/10B coding, embedded clock signal and micro-package framework; video content is with the transmission of package mode; support HDCP digital content protection agreement; can simultaneously transmission of audio and video; maximum transmission bandwidth is 10.8Gb/S; it directly carries out the transmission of the low bandwidth data such as voice, video by the external channel that can realize two-way communication, and the DisplayPort HDMI that compares has larger transmission bandwidth and stronger compatibility.DiiVA, i.e. digital high-definition interaction interface, released in April, 2009 by 9 enterprises such as TCL, Hisense, Skyworth, Konka, Changhong, Haier, SVA, panda electronics, Ling Xu, adopt the 8B/10B coding techniques identical with DisplayPort interface, support that video bandwidth reaches 13.5Gbps, support that hybrid channel frequency range adds up to more than 2Gbps, bi-directional data and audio transmission can be done, also support HDCP2.0 and DTCP-IP simultaneously, it adopts the connected mode of daisy chain, and any one equipment in DiiVA network can be accessed mutually.Different consumer electronics producers, semiconductor company, testing equipment producer and commercial electronic manufacturer, according to number one needs, in the product of oneself, select different digital audio/video interfaces, these products comprise Digital Television, DVD, video tape recorder, computer, Set Top Box, video camera.
In addition, described compatibility multiple audio-video signal interface the DVB-S Set Top Box with standby mode comprise further: described audio and video display device 9 comprises separates TS bag unit, to carry out solution TS package operation to the TS stream received.
Adopt the multiple audio-video signal interface of compatibility of the present invention and there is the DVB-S Set Top Box of standby mode, improve that original structure is single, the DVB-S Set Top Box of poor compatibility, the holding state of power saving whether is entered by the intensity size controller top box of digital video broadcast-satellite signal, and use fpga chip to realize the reception of multiple format audio-video signal, for DVB-S Set Top Box saves electricity consumption spending, make DVB-S Set Top Box can connect more outside audio frequency and video storage device, improve the compatibility of DVB-S Set Top Box.
Be understandable that, although the present invention with preferred embodiment disclose as above, but above-described embodiment and be not used to limit the present invention.For any those of ordinary skill in the art, do not departing under technical solution of the present invention ambit, the technology contents of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solution of the present invention, or be revised as the Equivalent embodiments of equivalent variations.Therefore, every content not departing from technical solution of the present invention, according to technical spirit of the present invention to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs in the scope of technical solution of the present invention protection.
Claims (1)
1. the multiple audio-video signal interface of compatibility there is the DVB-S Set Top Box of standby mode, it is characterized in that, described Set Top Box comprises:
Signal strength detection device, unified signal interface arrangement and electric power controller, described electric power controller connects described signal strength detection device and determines whether described Set Top Box enters holding state with the signal strength signal intensity detected according to described signal strength detection device, the connection of the audio-video signal of compatible DVI, HDMI and DisplayPort form of described unified signal interface arrangement
Also comprise:
Quarternary phase-shift keying (QPSK) signal qpsk demodulator, receiving satellite word television broadcasting signal also carries out QPSK demodulation to described digital video broadcast-satellite signal;
Described signal strength detection device detects the signal strength signal intensity of the digital video broadcast-satellite signal received, and exports described signal strength signal intensity;
Matched filter, connects described qpsk demodulator, carries out matched filtering to the signal after QPSK demodulation, with restraint speckle, improves signal to noise ratio;
The Viterbi decoder of soft-decision, connect described matched filter, soft-decision, Viterbi decoding are carried out successively to the signal that described matched filter exports, described soft-decision is close to best maximum-likelihood decoding, realize in scale larger than hard decision, but improve signal to noise ratio, described Viterbi decoding is a kind of decoding algorithm of convolution code;
Convolutional deinterleaver, connects the Viterbi decoder of described soft-decision, the signal that the Viterbi decoder of described soft-decision is exported carry out the degree of depth be 12 convolution deinterleave, export convolution deinterleave after error protection bag;
Reed-solomon RS decoder, connect convolutional deinterleaver, RS (204,188) decoding is carried out to the error protection bag received, export the packet of 188 bytes, the packet of described 188 bytes is the transport stream TS stream of Motion Picture Experts Group MPEG-2 frame structure;
Sync byte reverses and goes randomisation means, connects RS decoder, by the TS diffluence randomization of MPEG-2 frame structure, and the sync byte SYNC1 byte in going the TS after randomization to flow is reversed;
Deplexing apparatus, connect the reversion of described sync byte and go randomisation means, TS after receiving also sync byte reversion described in demultiplexing and going randomisation means reversal synchronization byte SYNC1 byte flows, outputting audio data TS flows, video data TS flows, additional data TS flows, Program Association Table PAT, Program Map Table PMT and service description list SDT, voice data TS flows, video data TS flows, additional data TS flows, Program Association Table PAT, Program Map Table PMT and service description list SDT has different Packet Identifier PID, described PID is used to be responsible for assigning the identifier of different value for different types of data in TS stream, described additional data comprises the data of independently data service, also comprise and described audio content, the data that described video content is relevant,
Audio and video display device, connect described Deplexing apparatus with audio reception data TS stream, video data TS stream, additional data TS stream, Program Association Table PAT, Program Map Table PMT and service description list SDT, and according to the descriptor that Program Association Table PAT, Program Map Table PMT and service description list SDT obtain each program in described digital video broadcast-satellite signal, flow according to voice data TS, video data TS flows, additional data TS spreads playback video content and additional data;
Described unified signal interface arrangement connects described audio and video display device, fpga chip is adopted to realize the connection of the audio-video signal of compatible DVI, HDMI and DisplayPort form, and by the audio-video signal retransmission of reception to described audio and video display device to carry out audio-video frequency content broadcasting, described fpga chip is the EP2C5Q208C8N of ALTERA company;
Described electric power controller connects described signal strength detection device to receive described signal strength signal intensity, determines whether described Set Top Box enters holding state according to described signal strength signal intensity;
State indicating device, indicates the current operating state of described Set Top Box, comprises the size of described signal strength signal intensity, whether described Set Top Box is in holding state, whether the data transmit-receive of described unified signal interface arrangement normal;
Wherein, the PID of each program in described digital video broadcast-satellite signal is obtained according to Program Association Table PAT, from described Program Map Table PMT, obtain the PID of PID, the additional data TS stream of PID, the video data TS stream that voice data TS corresponding to each program flows according to the PID of each program, from described service describing table SDT, obtain the programm name of each program according to the PID of each program;
Wherein, when described signal strength signal intensity is less than or equal to 40dBuV, described electric power controller controls described Set Top Box and enters holding state, and when described signal strength signal intensity is greater than 40dBuV, described electric power controller controls described Set Top Box and enters normal operating conditions;
Described additional data is caption data,
The audio-video signal of described DVI, HDMI and DisplayPort form from outside audio/video storage device,
Described audio and video display device comprises separates TS bag unit, to carry out solution TS package operation to the TS stream received.
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| CN107786880A (en) * | 2016-08-25 | 2018-03-09 | 晨星半导体股份有限公司 | Multimedia processing system and its control method |
| CN108632657B (en) * | 2018-07-06 | 2020-12-01 | 深圳创维－Rgb电子有限公司 | Subtitle display method, storage medium and smart television |
| CN113691744A (en) * | 2020-05-19 | 2021-11-23 | 瑞昱半导体股份有限公司 | Control signal transmission circuit and control signal receiving circuit of audio-visual interface |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000332633A (en) * | 1999-05-24 | 2000-11-30 | Sharp Corp | Digital broadcasting receiver |
| CN1497964A (en) * | 1995-07-12 | 2004-05-19 | ��ķɭ���ѵ�������˾ | Device for decoing video signal of different form coded |
| CN1225844C (en) * | 2002-01-07 | 2005-11-02 | 夏普公司 | Low power consumption satellite broadcasting and receiving converter |
| CN201315630Y (en) * | 2008-11-12 | 2009-09-23 | 康佳集团股份有限公司 | DVB-S set top box with standby touch key |
| CN201491188U (en) * | 2009-08-13 | 2010-05-26 | 深圳市九洲电器有限公司 | Set-top box and multiple-video format decoding device thereof |
| CN102186226A (en) * | 2010-12-23 | 2011-09-14 | 上海华勤通讯技术有限公司 | Mobile phone for self-adapting communication environment and energy-saving method thereof |
| CN101493848B (en) * | 2008-01-23 | 2012-05-23 | 贝赛莱（上海）多媒体信息技术有限公司 | FPGA plate for multimedia information process and integrated circuit verification thereof |
-
2013
- 2013-05-15 CN CN201310180395.3A patent/CN103237253B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1497964A (en) * | 1995-07-12 | 2004-05-19 | ��ķɭ���ѵ�������˾ | Device for decoing video signal of different form coded |
| JP2000332633A (en) * | 1999-05-24 | 2000-11-30 | Sharp Corp | Digital broadcasting receiver |
| CN1225844C (en) * | 2002-01-07 | 2005-11-02 | 夏普公司 | Low power consumption satellite broadcasting and receiving converter |
| CN101493848B (en) * | 2008-01-23 | 2012-05-23 | 贝赛莱（上海）多媒体信息技术有限公司 | FPGA plate for multimedia information process and integrated circuit verification thereof |
| CN201315630Y (en) * | 2008-11-12 | 2009-09-23 | 康佳集团股份有限公司 | DVB-S set top box with standby touch key |
| CN201491188U (en) * | 2009-08-13 | 2010-05-26 | 深圳市九洲电器有限公司 | Set-top box and multiple-video format decoding device thereof |
| CN102186226A (en) * | 2010-12-23 | 2011-09-14 | 上海华勤通讯技术有限公司 | Mobile phone for self-adapting communication environment and energy-saving method thereof |
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